High-Dimensional Information Detection based on Correlation Imaging Theory

Radar is a device that uses electromagnetic(EM) waves to detect targets; it can measure the position parameters and motion parameters and extract target characteristics information by analyzing the reflected signal from the target. From the perspective of the radar theoretical basis of physics, the more than 70 years of development of radar are based on the EM field fluctuation theory of physics. Many theories have been developed towards one-dimensional signal processing. For example, a variety of threshold filtering have widely used as methods to resist interference during detection. The optimal state estimation describes the propagation process of the statistical characteristics of the target over time in the probability domain. Compressed sensing greatly improves the reconstructing efficiency of the sparse signal. These theories are one-dimensional information processing. The information obtained by them is a deterministic description of the EM field. The correlated imaging technique is from the high-order coherence property of the EM field, which uses the fluctuation characteristic of the EM field to realize non-local imaging. Correlated imaging radar, a combination of correlated imaging techniques and modern information theory, will provide a novel remote sensing detection and imaging method. More importantly, correlated imaging radar is a new research field. Therefore, a complete theoretical frame and application system should be urgently built up and improved. Based on the coherence theory of the EM field, the work in this thesis explores the method of determining the statistical characteristics of the EM field so that the high dimensional target information can be detected, including theoretical analysis, principle design, imaging modes, target detecting models, image reconstruction algorithms, the enhancement of visibility, and system design. The simulations and real experiments are set up to prove the theory's validity and the systems' feasibility

Feasibility of superconductivity in semiconductor superlatices

The objective of this thesis is to explore superconductivity in semiconductor superlattices of alternating hole and electron layers. The feasibility of superconductivity in semiconductor superlattices is based on a model formulated by Harshrnan and Mills. In this model, a semiconductor superlattice forms the layered electron and hole reservoirs of high transition temperature (high-Tc) superconductors. A GaAs-A1xGa1-xAs semiconductor structure is proposed which is predicted to superconduct at Tc = 2.0 K and may be analogous to the layered electronic structure of high-Tc superconductors. Formation of an alternating sequence of electron- and hole-populated quantum wells (an electron-hole superlattice) in a modulation-doped GaAs- A1xGa1-xAs superlattice is considered. In this superlattice, the distribution of carriers forms a three-dimensional Wigner lattice where the mean spacing between carriers in the x-y plane is the same as the periodic distance between wells in the superlattice. This geometrical relationship mimics a prominent property of optimally doped high - Tc superconductors. A Schrodinger-Poisson solver, developed by Snider, is applied to the problem of determining the appropriate semiconductor layers for creating equilibrium electron-hole superlattices in the GaAs-A1xGa1-xAs system. Formation of equilibrium electron-hole superlattices in modulation-doped GaAs-A1xGa1-xAs is studied by numerical simulations. Electron and heavy-hole states are induced by built-in electric fields in the absence of optical pumping, gate electrodes, or electrical contacts. The GaAs-A1xGa1-xAs structure and the feasibility of meeting all the criteria of the Harshman model for superconductivity is studied by self-consistent numerical simulation. In order to test the existence of superconductivity, the physics of sensor arrays and their ability to create synthetic images of semiconductor structures, is explored. Approximations are considered and practical applications in detecting superconductivity in superlattices are evaluated

Pattern-theoretic foundations of automatic target recognition in clutter

Issued as final reportAir Force Office of Scientific Research (U.S.

Weak Coherent Pulse Source and Polarization Control for Quantum Key Distribution

The Quantum EncrYption and Science Satellite will demonstrate quantum communication from space. One demonstration will be a satellite uplink using a weak coherent pulse source. This thesis will discuss work in minimizing the quantum bit error rate of polarization-encoded states produced by the weak coherent pulse source, including a wave packet model developed to quantify fiber length and angular alignment tolerances within the system. In addition, the weak coherent pulse sources makes use of polarization-maintaining fibers, requiring a polarization control system to compensate for phase shifts induced in the fiber during operation of the quantum uplink. Methods for polarization control in polarization-maintaining fiber are explored and compared

Training Manual ICAR Short course on Application of advanced molecular methods in marine fishery resource management, conservation and sustainable mariculture

Molecular Biology and Biotechnology has undergone incredible progress in this decade mainly due to the rapid advancements in DNA sequencing technologies. Marine biology and fishery science also reaped the fruits of these modern inventions improving our understanding regarding complex adaptations in aquatic organisms. Fish Genetics have evolved into genomics incorporating knowledge about neutral and non-neutral markers. A project called Genome 10k was started by the international community of scientists for sequencing the genome of 10000 vertebrates. Whole genomes of many marine organisms are now available which provided insights into the evolution of many important traits. Transcriptome sequencing provides insights into expressed genes and metagenome sequencing provides information regarding the microbes present in environment. All these technologies are rapid and cost effective. Over years, these technologies provided exciting opportunities for understanding ecology and evolution. Genomic information can also be sustainably utilized to enhance productivity of mariculture activities by selective breeding, genetic improvement and manipulation of economically important traits. ICAR-Central Marine Fisheries Research Institute has contributed significantly to marine biotechnology research in the country and played a pivotal role in development of marine fisheries sector. The short course on “Application of advanced molecular methods in marine fisheries resource management, conservation and sustainable mariculture” conducted in ICAR-CMFRI from 24th October, 2018 to 2nd November, 2018 is specially designed to provide exposure to various applications of molecular tools in fisheries resource management, conservation of biodiversity and mariculture. I hope this compendium of lectures and protocols will be extremely useful for the participants to effectively utilize the knowledge in their own area of research. Simultaneously, on behalf of ICAR-CMFRI, I warmly welcome all the participants from various institutions and wish them all success in their future endeavors. I am sure that this training will result in new knowledge, collaborations and friendships